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Configuring RAID recovery
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RAID recovery mode of ZAR 8.4 is used to recover data
when the array configuration (such as stripe size, or the order of the
array member disks) is lost. If you determine the situation involves
RAID reconstruction, select the appropriate mode in
Task types. The drives should be accessible as a
separate devices. This means you should either connect them to the
regular (non-RAIDed) ports, or reconfigure the RAID controller as
required to provide access to the drives independently. |
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Select disks which are members of the array. If the array is RAID5 with one
disk missing, select all available array members - the missing disk will be
reconstructed based on the RAID5 parity data. |
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Generally, search for a RAID0 is cheaper than for a RAID5. Worst case
overhead is to search for a RAID5 when there isn't one (parity will be
recalculated out of the anticipation that one of the member disks is missing,
which is costly in terms of execution time).
- If you know the array is RAID0, clear all RAID5 derivatives in the
"Possible Layouts" box.
- If one disk is missing from a RAID5 array, mark all the available
members of the array. The missing disk will be reconstructed automatically.
- When not sure to choose either "LDM" or "Checkerboard" RAID5 layout,
select both.
- Avoid ordering to search the drive that was not a member of the array.
This is especially important in case of a RAID5, because an additional drive
will cause parity recalculation, resulting in even more disks to search, and
the algorithm might get lost in all the possibilities.
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He who fails to fire up ZAR after a disk crash is asking for trouble.
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Weekend discount in effect
44 hours 51 min left
This small piece of software, within minutes of downloading,
made me the happiest guy in the world.
My camera did something weird to my SmartMedia card, rendering it useless.
Upon card insertion, the camera and subsequent computers asked if I wished to format the card.
I did NOT format the card, because I had just spent 2 hours taking promo pictures for my business
in lots of different locations, and figured SOMEbody could figure it out...
[...] When I found this program, although it took a minute or two to figure out which "number"
went with my USB SmartMedia reader, I clicked a few buttons, and this program went right to work.
It took about 5-10 seconds per picture to recover - I was ELATED!
Thank you for providing this piece of software for free.
I figure the least I could do was come back to say thank you.
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